FR2472471A1 - DEVICE FOR CONTROLLING THE FOLDING VALVES OF A ROTARY PRINTING MACHINE FOLDING VALVE CYLINDER - Google Patents

Abstract

A. DEVICE FOR ORDERING THE BENDING VALVES OF A ROTARY PRINTING MACHINE BENDING VALVE CYLINDER. B. DEVICE CHARACTERIZED IN THAT THE BENDING VALVES 8 WHICH FOLLOW IN ROTATION IN THE SAME DIRECTION AS THE VALVE CYLINDER 1 ARE ACTUATED, ONLY DURING A TRANSMISSION OF THE PRODUCTS A, BY A CAM PLATE 7, AND THE BENDING VALVES 11, 12 WHICH PREVIOUSLY IN ROTATION ARE ACTUATED, ONLY IN TWO POSSIBLE LOCATIONS FOR COLLECTING PRODUCTS B, C BY TWO OTHER CAM PLATES 9, 10, ALL CAM PLATES 7, 9, 10 TURNING IN DIRECTION OF THE VALVE CYLINDER 1 C. DEVICE APPLICABLE TO PRINTING ROTARY FOLDERS.

Description

The invention relates to a device for the com-

  bending valves of a cylinder with flaps for

  folding machine for rotary printing machines, with a number of

  pairs of folding valves, including the pivoting flaps

  tants are actuated by cam plates. It is often required that the products receive, after the first transverse folding, formed by the folding knife and folding roll cylinder cooperation, a

  second longitudinal fold, also referred to as third folding.

  Since the working speed of the device is limited for the third folding, it is frequently the case that the products are distributed over two of these devices, in order to use as fully as possible the flow capacity of the machine.

  even with this type of production.

  In the case of a folding valve cylinder equipped with an even number of pairs of folding valves, it is known to deliver the products to a place and then, by means of a controlled switch, to distribute them. two conveyor belts connected, for example, each to a device for the third folding. The disadvantage of this solution is that, as a general rule, the lower conveyor belt can not be fed far enough to the needle for the products to be accurately guided, even in the transition zone between the roller cylinder of folding and the conveyor belt. In addition, the possibility of access to this area is made very difficult, which is reflected in particular by

bottlenecks.

  Regardless of this, problems are also

  raised by the control of the machine folding valves 2. print rotating at high speed. The cam rollers which roll on fixed cam profits as well as the pivoting levers which connect them to the folding valves are subjected, due to the high relative speed between rollers and cam plates, to a very high dynamic load. This results in an uneven displacement of the cam followers, as well as increasing noise development, and significant wear

transmission mechanisms.

  In order to reduce the relative speed between platen and cam follower, it has been proposed by DE 633 756 and DE 2 316 227 to reduce the diameter of the cam profile plate. This measurement requires, however, compared to current solutions with a pivoted lever mounted at one end in the valve cylinder, and carrying at the other end the cam follower, additional transmission members, for example pushers. This inevitably results in an increase in the inertia forces of the mechanism and a greater number of articulation and guide joints for the transmission members, which acts in a negative way on the desire to increase the production capacity of the machine. folding apparatus, due to increasing wear and lack of precision in

the transmission of movements.

  The object of the invention is to improve the operational safety of a valve control device of a cylinder with folding valves of rotary printing machines, having an even number of pairs of folding valves, including the pivoting flaps. are operated by cam profile trays, in order to increase the

production of the folding apparatus.

  The invention proposes, for this purpose, a solution of universal application and operation sr, in such folding devices, even in the case of high speeds of the machines, for a distribution of the product stream following the cylinder to folding dampers, which reduces the dynamic load and the risk of wear of the

  control of the valves, in particular cam rollers and

  transmission which binds these rollers to the folding valves,

compared to known solutions.

  The invention is characterized in that the folding valves which follow in rotation in the same direction as the valve cylinder are actuated, only during a transmission of the products, by a cam plate, and the folding valves which

  preceding in rotation are operated, only in two places

  possible picking of products by two other cam plates, all cam plates rotating in the direction

of the valve cylinder.

  This solution allows, in the case of a folding valve cylinder provided with an even number of valve pairs, a sampling of products in two places, which can be chosen, in the context of the spatial conditions, at will, at inside the folding apparatus. It is thus possible to

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  perform a safe operation sharing of the product stream.

  The two conveyor belts can be

  optimally shaped in the form of a switch, so that the guidance of the products in this area is improved. Due to the increased operational safety achieved, the throughput of the folding apparatus can be increased. The possibility of access

  at referrals is significantly more favorable.

  The two partial streams of products can then be transmitted, by each of the conveyor belts, to a device operating at a slower speed, for

perform the third folding.

  Another advantage is the relative speed between the constant rotation cam plates and the cam followers which roll over them. This results in favorable conditions for an increase in the production rate due to the reduction of the dynamic load on the control device of the folding valves. The transmission mechanisms are thus subjected to a much lower friction wear and the operational safety of the device is increased. In addition, the noise developed by the efficiency of the rollers is decreased. Taking into account the ratio of transmission between cam plate and folding valve cylinder, the speed of the cam rollers rises, in the case of two pairs of valves, to 1/3, in the case of four pairs, at 1/3 or 1/5 and, in the case of six pairs, at 1/5 or 1/7 of the speed of a roller of

  cam rolling on a fixed cam profile.

  Advantageously, it is also possible to use

  the principle that for different impressions, it is necessary to provide for a transverse folding separately after the second

  folding, or possibly a third folding.

  To vary the two sampling locations

  of products, it is advantageous to provide, in accordance with the

  vention, that the two cam profile trays, for the action-

  of the preceding folding valves in rotation, can be placed next to each other on the shaft of the folding valve cylinder and immobilized against rotation relative to each other by means of connection to screws or the like. It is thus possible to vary the angle of offset d of rotation between the two plates, according to the relationship 4 24724? I = 4- depending on the position of the two locations of

collection of products.

  This possible variation of the locations for the removal of products inside the folding apparatus offers important advantages, for the conversion, with a

  low expenditure, the production of the folding apparatus con-

  form to the invention - for example, instead of folding 2 x 3,

  direct delivery after the second folding, or for

  subsequent formation of a standard type bending apparatus, with modified production requirements, taking into account

  adaptation possibilities to the available location.

  An advantageous variant of the solution for driving the control cam platters of the folding flaps is that, in accordance with the invention, a toothed wheel is provided which is connected to the drive of the folding apparatus. folding, engaged with a gear wheel attached to a shaft of the body of a folding knife cylinder carrying an element

  feeding of the leaves. This toothed wheel causes, through

  intermediate wheels, two of which are

  mounted on a side of the apparatus and are interconnected by a shaft, two cam plates for controlling the folding valves, these wheels being in common with a gear wheel of the same size, engaged with a wheel toothed valve cylinder, fixed on a hollow shaft of a cylinder body-carrying a folding knife, and receiving the shaft of the cylinder body for the sheet feed elements. This toothed wheel of the same magnitude, however, has an oblique toothing, with a pitch of opposite slope, in a double axially slidable gear wheel whose partial toothing is equipped with an oblique toothing adapted to the toothed wheel meshing with it. This drive mode offers the advantage of giving the possibility of a positional shift of the fold, that is to say a shift in rotation of the body of the cylinder carrying the knife.

  folding cylinder, including the folding valve cylinder, by way of

  port to the cylinder body with knife bearing the elements of soul-

  born of leaves, without displacement of position of the trays to

  control cam of the folding valves.

  The invention is explained below with the aid of an exemplary embodiment, with reference to the accompanying drawings in

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  FIG. 1 is a longitudinal sectional view through a folding valve cylinder, with partial representation of the drive for the cylinder, and cam trays for the control of the folding valves, according to the plan.

section D-D of FIG.

  FIG. 2 is a representation similar to

  Figure 1, but by the sectional plane E-E of Figure 4.

  FIG. 3 is a longitudinal sectional view through a folding knife cylinder, with representation of its driving connection with the folding valve cylinder. FIG. 4 is a side elevational view with four pairs of folding valves, offset from each other by 90 degrees, and showing the possibility of sampling of products.

in two different locations.

  According to FIGS. 1 and 2, the cylinder with folding valves 1 is supported, with its shaft 2, of each

  c8té in a side wall 3 or 4, the folding apparatus.

  On each side of the folding valve cylinder 1 (FIGS. 1 and 2) is rotatably mounted on its shaft 2 a toothed wheel, respectively 5 and 6. One of these toothed wheels, disposed on the right side, is integrally connected to the cam plate 7 for the control of the folding valves 8, in the direction of rotation of the valve cylinder 1, operated exclusively during the collection of products A (Figure 4). The other toothed wheel 6, arranged on the right side is made integral, by bolting, with two cam plates 9 and 10, which can be offset between them by rotation3 and which serve to control the folding valves 1lg 12, exclusively

  during a sampling of products in B and C (Figure 4).

  Folding valves 8, 11, 12 are rigidly connected

  each of them to a lever 13, 14, 15, which is rotatably mounted

  on its end, a curve follower 16, 17, 18

respectively.

  From FIG. 4, it can be seen that the valves 11,

  12 are assigned alternately, depending on their success.

  1, at one of the curves 19, 20 of the cam plates 9, 10, so that all the cam rollers 17 of the valves 11 actuated for the 24724 of products at the location C are on the curve 19 in solid lines (Figure 4) of the cam plate 9 (Figure 1) while all the cam rollers 18 of the valves 12 actuated for the same purpose in the location B roll on the curve indicated in solid lines (20) of the cam plate 10

(Figure 2).

  The curve 21 for controlling the valves 8 is constituted by a hollow groove profile 22 (FIGS. 1 and 2)

  in which the corresponding cam rollers 16 are engaged.

  In FIGS. 1 and 2, for the sake of greater legibility of the figure, all the roller levers 13, 14, 15 are represented in the rotated position and thus the rollers 16, 17,

  18 are all out of contact with the cam plates 7, 9, 10.

  The toothed wheels 5, 6 (FIGS. 1 and 2) meshing

  each with one of the intermediate wheels 23, 24 which are

  in common on a traversing shaft 25 which is supported

  in the side walls 3 and 4 of the folding apparatus.

  The intermediate wheel 23 is connected by means of

  intermediate intermediate 26, 27 (Figures 1 and 2), with a gear wheel 32 (Figure 3) fixed on the shaft 28, from the side wall 4 of the folding apparatus, the body 30 of the folding knife cylinder 31, which carries the sheet feeding elements 29. This gear wheel 32 is

  driven by a toothed wheel 33 of the formation of the

folding.

  On the shaft 28 is rotatably mounted by plugging, the hollow shaft 34, supported in the side wall 3, of the body

  36 of the knife cylinder 31 which carries the folding knife 35.

  On the outer end of this hollow shaft is wedged a

  toothed wheel 37 of the same magnitude as the gearwheel 32, but

  seen from an oblique toothing of opposite pitch (Figure 3). The two coaxial gears 32 and 37 each mesh in a

  corresponding partial toothing 38, 39 of a double wheel

  40, which is mounted on a pin 41 supported in the side wall 3 of the apparatus, and which can be slid axially, by a driving member 42, by means of a threaded shaft 45 provided frontally with a steering wheel handpiece 44, and which is guided in a housing screwed on the side wall 3. The partial teeth 38 and 39 each have an oblique toothing adapted to each of the toothed wheels 32 and 37. Between the housing 43

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  and the handwheel 44, is further provided a threaded ring 47 provided with a hand lever 45, serving as a lock against a

  unwanted rotation of the threaded shaft 45.

  - The toothed wheel 37 is still engaged with the toothed wheel 48 fixed on the shaft 2 (FIGS. 1 and 2) which serves to

  the driving of the valve cylinder 1.

  In FIG. 4, the folding valve cylinder 1 has four pairs of folding valves I to IV offset from each other by 90 degrees. The cam plates 7, 9, 10 rotate in a 4: 3 ratio with the poppet cylinder. For this, the driving connection between the valve cylinder 1 and the cam plates 7, 9, 10 is provided by gear wheels

  staged geometrically in this report.

  The cam curves 19, 20, 21 have three zones of action 55, 56, 57 equidistant, that is to say shifted by 120 degrees with each an upward slope 49, 50, 51 and

a downward slope 52, 53, 54.

  According to FIG. 4, the two locations chosen for the removal of products B and C are offset from each other by an angle M. After the preceding valve in rotation 11 of the flap valves I and III is opened by the curve of FIG. cam at the location C and that the previous valve 12 of the valve pairs II and IV is opened by the curve 20 at the location B for a sampling of products, it is necessary that the

  curves 19, 20 taking into account the number b of operating zones

  55 or 56 on each curve, are offset from each other in rotation of the angle ci in accordance with the relation i =, by

  example i = and are immobilized in this position.

  In general, the two cam plates for actuating the preceding valves in rotation, with cam curves rotating faster than the valve cylinder, according to the example described, are opposite in their direction.

  of rotation, and, with cam curves turning slower-

  than the cylinder, they are offset from the angle c4 in their

sense of rotation.

  The cam plate 7 (FIGS. 1 and 2) is constituted in such a way that in each case, by the pairs of valves I to IV (FIG. 4) at the location A occurs a withdrawal of the product by the knife cylinder. 31, with at the same time transverse folding of the product by collaboration of the knife of

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  folding 35 with the valves 8 and 11 and 8 and 12 of the valve cylinder. In this case, it is exclusively the valve that followed 8 which had been previously opened which acts on the product that is to say it closes, while the previous valve in rotation 11 or 12 remains closed during tojut the process. On the other hand, for a sample of product at the location C, it is only the preceding valve in rotation 11 of the pairs of valves I and II, and, in the location B, the preceding valve in rotation 12 of the pairs II and IV which open, while the following valves in rotation 8 of all the pairs of valves

I to IV remain closed.

  During product sampling, the cam follower 16 for actuating the next rotating valve 8, is in the lowest position of the operating zone 57 of the curve 21 and the roller 17 or 18 for the Actuation of the previous valve 11 or 12 in rotation is in the upper engagement groove 58 or 59. For the product withdrawal at the location C, the cam follower 17 is, with the folding valve 11 open, in the lowest position of the actuating zone 55 and the roller 16 which holds the valve 8

  closed is in the upper groove 60 of curve 21.

  In a similar way, for the taking of product

  in the location B, simply the valve 12 is open, that is to say

  say that the cam follower 10 is in the lower part

  of the operating zone 56 of the curve 20.

  FIG. 4 shows the manner in which, at location A, the product is transferred, simultaneously with a transverse folding, from the knife cylinder 31, to the pair of folding valves I of the valve cylinder 1, and the whereby, at the location C, a folded product is transferred from the pair of folding valves III to the conveyor belt 61. The pair of folding valves II holds a product delivered at the location B to the web 62, while the pair of valves IV has already delivered the product to the location B. The pairs of valves I and III thus permanently deliver their products to the location C and the pairs of valves II and iV to the location B. In the case of group production,

  which positions of the folding knife cylinder 31 function-

  as a grouping cylinder are loaded in duplicate and

247247 1

  all products are delivered to either location B or location C. To facilitate delivery of the product, the upper band 62 has a controlled deflection tab 64 and the lower band 61 an uncontrolled deflection tab 63 The strips are coupled in an unrepresented manner

  for example each with a third folding device.

  The drive shown in Figures 1, 2 and 3 for the cylinder with valves and knife cylinder brings

  the advantage that, by means not described here, one can pro-

  give way to a folding movement irrespective of the

  For this, after release of the threaded ring 47, using the handwheel 44, the double gearwheel 40 is displaced axially. Due to the ratio of the steps, indicated in FIGS. symbolically by a circle, oblique toothings of the toothed wheels 32, 37 and the double toothed wheel 40, the position of the toothed wheel 32 remains preserved, including that of the cylinder body 30 of the knife cylinder 31 which carries the elements of supply of sheet, as well as that of the drive, connected to the toothed wheel 32, for the cam plates 7, 9 and 10 via the intermediate wheels 27, 26, 23, 24, while the wheel toothed 37, including the cylinder body 36 of the knife cylinder 31 carrying the folding knife, as well as the toothed wheel 48 for driving the folding valve cylinder 1, are offset in rotation from one to another.

corresponding quantity.

  As a variant of the solution shown in FIGS. 1, 2 and 3, it is also possible to envisage a drive

  cam plates 7, 9 and 10, directly from the

  tracing of the folding apparatus, by means of wheels

  with front teeth or conical toothed wheels.

  The angle P between the locations B, C for the sampling of products can be varied at will. To do this, after loosening the bolted connection, rotate the two cam plates 9, 10 (FIGS. 1 and 2) by an angle at% corresponding to the relation i = 0- and shift them.

  between them angularly in the manner described.

  It is also possible to move together

  two locations B and C, maintaining a given angle t.

  For this, it suffices, after loosening the bolted connection, 247247i to rotate together the cam plates 9 and 10 relative to

the toothed wheel 6 (Figures 1 and 2).

  The conditions shown in FIGS.

  4 may, in accordance with the principle of the invention, be

  with a folding valve cylinder equipped with another even number of valve pairs. The table below gives a

  a summary of the possible use cases of the invention.

  Pair of Number of Zones Breakdown Angle Report

  action valves by transmission of the zones bending cam curve between the action plate of the cam and the cycles of the liner cam

2 3 2/3

3 4/3

4/5 5

  _______________..________________ _______________.._______________

6/5

7 6/7

  _ _ _ _ _ _ _ _ _ _ _ _ _ _ __

he

Claims (2)

CLAIMS) Device for controlling the folding valves of a rotary printing machine folding machine cylinder cylinder, with an even number of folding valves actuated by cam plates, characterized in that the folding valves (8) which follow in rotation in the same direction that the valve cylinder (1) is actuated, only during a transmission of the products (A), by a cam plate (7), and the folding valves ( 11, 12) which are rotated in advance are actuated only at two possible product withdrawal locations (B, C) by two further cam plates (9, 10), all cam plates (7, 9, 10). ) rotating in the direction of the valve cylinder (1), the preceding folding valves (11, 12) in their succession on the periphery of the valve cylinder being alternatively assigned to one of the two cam plates (9, 10) provided for them, the speed of rotation of all the disks being ort to that of the cylinder in a ratio of 2/3 for a cylinder provided with two pairs of plates evenly spaced on its circumference, in a ratio of 4/3 or 4/5 for a cylinder provided with four pairs of valves, and in a ratio of 6/5 or 6/7 for a cylinder provided with six pairs of valves, the curves (19, 20,   21) of the three cam plates (7, 9, 10) being distributed regularly.   in the indicated succession, for two pairs of valves (3), for four pairs (3 or 5), and, for six pairs, (5 or 7), each curve having an upward slope (49, 50, 51) and a downward slope (52, 53, 54) surrounding action zones (55, 56, 57), the two cam plates (9, 10) for controlling the preceding rotating valves (11, 12), holding the number b of the action zones (55, 56) per curve (19, 20) and the angle (δ) between the two product sampling locations (B, C) being, in the case cam plates (9, 10) rotating faster than the check cylinder (1), opposed in the direction of their rotation, but, in the case of trays rotating slower than the cylinder being offset between them, in the direction of their rotation, of an angle se = b. b *   Device according to claim 1, characterized   in that the two cam plates (9, 10) for the action   previously rotating valves (11, 12) are   next to each other on the shaft (2) of the folding valve cylinder (1) and can be rotated one by one   relative to each other, being immobilized by bolted connections.   30) Device according to claim 1, characterized by a toothed wheel (33) connected to the drive of the folding apparatus engaged with a wheel (32) fixed to the shaft of a cylinder body ( 30) of a knife cylinder carrying sheet feeding members (29) which drives the cam plates controlling the folding valves (8, 11, 12) through a plurality of toothed wheels (27). , 26, 23, 24) disposed two on each side of the folding apparatus, said wheels being in common engagement with a toothed gear (48) of the   valve cylinder (1), and a toothed wheel (37) of the same size   mounted on a hollow shaft (34), containing the shaft (28) of the roller body (30) for the sheet feed members, of the cylinder body (36) of the knife cylinder (31) carrying   a folding knife (35), this toothed wheel (37) being, however,   engaged with an oblique toothing, of opposite pitch, of a   double gear wheel (40) sliding axially, whose den-   parts (38, 39) are each equipped with an oblique toothing adapted to the corresponding meshing gear (32, 37).